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Found 10 records similar to 30-year Average Potential Evapotranspiration (mm)

Federal

The Versatile Soil Moisture Budget (VSMB) is a soil water budget model that is continuous and deterministic in nature and was developed by AAFC. It is based on the premise that the water available for plant growth is gained by precipitation or irrigation, and lost through evapotranspiration and runoff as well as lateral and deep drainage. The daily net loss or gain is added or subtracted from the water already present in the rooting zone. Water is withdrawn simultaneously, but at different rates, from different soil depths, depending on the potential evapotranspiration, the stage of crop development, the water release characteristics of each soil layer and the available water.

Last Updated: Jul. 27, 2021
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST TIFF
Keywords:  Soil Moisture, Farmlands, Crops, Agriculture, Temperature, Precipitation
Federal

The Crop Stress Index is the ratio of actual evapotranspiration (AET) to potential evapotranspiration (PET) express as:

CSI = 1-(AET/PET)

AET and PET are calculated within the Versatile Soil Moisture Budget (VSMB) model using temperature and precipitation data and a crop-specific biometeorological time scale model to estimate growth stage (Robertson, 1968), with crop specific phenological and crop water extraction coefficients taken from Chipanshi et al 2013. The WDI ranges between 0 and 1, with a value closer to 1 indicating higher stress Crop Stress Index is modelled for each climate station using measured precipitation and temperature

Last Updated: Nov. 15, 2021
Date Published: Jun. 1, 2018
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF ESRI REST
Keywords:  Agriculture, Crops
Federal

The Standardized Precipitation Evapotranspiration Index (SPEI) is computed similarly to the SPI. The main difference is that SPI assesses precipitation variance, while SPEI also considers demand from evapotranspiration which is subtracted from any precipitation accumulation prior to assessment.

Unlike the SPI, the SPEI captures the main impact of increased temperatures on water demand.

Last Updated: May 4, 2022
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST GeoTIF
Keywords:  SPEI, agclimate, Agriculture, Crops, Farmlands, Temperature, Precipitation
Federal

The term "Palmer Drought Index" has been used collectively to represent multiple indices. This index is simply a water balance model which analyzes precipitation and temperature, and used as a tool to measure meteorological and hydrological drought across space and time. All versions of the index uses the Versatile Soil Moisture Budget to model the movement of water within the system, and a daily Priestly-Taylor model to estimate evapotranspiration. The Palmer Drought Index (PDI) uses monthly temperature and precipitation data to calculate a simple soil water balance.

Last Updated: May 4, 2022
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST GeoTIF
Keywords:  PDI, agclimate, PHDI, Farmlands, Agriculture, Crops, Temperature, Precipitation
Federal

The term "Palmer Drought Index" has been used collectively to represent multiple indices. This index is simply a water balance model which analyzes precipitation and temperature, and used as a tool to measure meteorological and hydrological drought across space and time. All versions of the index uses the Versatile Soil Moisture Budget to model the movement of water within the system, and a daily Priestly-Taylor model to estimate evapotranspiration. The Palmer Drought Index (PDI) uses monthly temperature and precipitation data to calculate a simple soil water balance.

Last Updated: May 4, 2022
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST GeoTIF
Keywords:  PDI, agclimate, PMDI, Agriculture, Crops, Farmlands, Temperature, Precipitation
Federal

Winds can significantly influence crop growth and yield mainly due to mechanical damage of plant vegetative and reproductive organs, an imbalance of plant-soil-atmosphere water relationships such as evapotranspiration, and pest and disease distributions in agricultural fields. The maximum wind speed and the number of strong wind days over the forecast period represent short term and extended strong wind events respectively. Agriculture is an important primary production sector in Canada. Agricultural production, profitability, sustainability and food security depend on many agrometeorological factors.

Last Updated: Oct. 26, 2022
Date Published: Nov. 1, 2018
Organization: Environment and Climate Change Canada
Formats: WMS PDF GeoTIF ESRI REST
Keywords:  Extreme Weather Indices, Farmlands, Weather forecasts, Weather, Climate, Meteorology, Agriculture, Wind
Federal

Drought is a deficiency in precipitation over an extended period, usually a season or more, resulting in a water shortage that has adverse impacts on vegetation, animals and/or people. The Climate Moisture Index (CMI) was calculated as the difference between annual precipitation and potential evapotranspiration (PET) – the potential loss of water vapour from a landscape covered by vegetation. Positive CMI values indicate wet or moist conditions and show that precipitation is sufficient to sustain a closed-canopy forest. Negative CMI values indicate dry conditions that, at best, can support discontinuous parkland-type forests.

Last Updated: Feb. 7, 2022
Date Published: Jan. 1, 2016
Organization: Natural Resources Canada
Formats: WMS TIFF MXD FGDB/GDB ESRI REST
Keywords:  climate moisture index, drought, moisture, evapotranspiration, precipitation, Climate, Climate change
Federal

Total soil moisture is the modelled amount of plant available water (mm) in the root zone of the soil. The value given is the amount calculated to be present on the modeled day of the product.

Values are computed using the Versatile Soil Moisture Budget (VSMB)

Last Updated: May 4, 2022
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST TIFF
Keywords:  Soil Moisture, agclimate, VSMB, TSM, Farmlands, Crops, Agriculture, Temperature, Precipitation
Federal

This map shows a simplified distribution of land cover types across Canada interpreted from satellite data obtained in 1995. Land cover has an important role in the water cycle as it significantly affects evapotranspiration and the amount of water leaving a watershed. Evapotranspiration is the sum of evaporation and transpiration, both of which are related to types of land cover. Plants with larger surface area and deeper roots have greater transpiration.

Last Updated: Mar. 14, 2022
Date Published: Dec. 31, 2010
Organization: Natural Resources Canada
Formats: JP2 other ZIP
Keywords:  environment, land cover, map
Federal

Difference from normal soil moisture is the modelled amount of plant available water (mm) in the root zone of the soil, minus the average amount that has historically been available on that day. This value is intended to provide users with a representation of conditions above or below normal and by the amount of water (mm).

Values are computed using the Versatile Soil Moisture Budget (VSMB)

Last Updated: May 4, 2022
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST TIFF
Keywords:  Soil Moisture, agclimate, VSMB, DNM, Farmlands, Agriculture, Crops, Temperature, Precipitation
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